| 21. | That outlined by the right triangle became the study center.
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| 22. | :For any positive value there is a right triangle whose altitude has that length.
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| 23. | The upper part of the jig is a right triangle with a roundover overhang.
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| 24. | Seen from above, the three stems form a right triangle.
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| 25. | It has something to do with a special right triangle and calculating it's area.
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| 26. | In other words, two copies will tile a right triangle.
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| 27. | 2 . 7 Andrew Jackson squared, isosceles right triangle.
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| 28. | Geometric concepts such as right triangles are also introduced.
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| 29. | :An isosceles right triangle is half of a square.
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| 30. | Visually, each square is divided into four right triangles, with two visible from each side.
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